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3.2 Dissipation and efficiency

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Question 9

An electric food mixer is supplied with 800 J while mixing some ingredients. Of this energy, 120 J is dissipated to the surroundings.

What is its efficiency?

[1]
A

15%15\%15%

B

0.85%0.85\%0.85%

C

85%85\%85%

D

87%87\%87%

Markscheme

3.2 Dissipation and efficiency Questions

  1. GCSE
  2. /Physics
  3. /3.2 Dissipation and efficiency

100 exam-style questions on Edexcel GCSE Physics 3.2 Dissipation and efficiency, covering 3.2.1 Dissipation of energy, 3.2.2 Reducing unwanted energy transfers, 3.2.3 Efficiency, and 3.2.4 Increasing efficiency. Each one has a worked solution and a mark scheme showing where the marks go.

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